A Christmas tree is displayed at Piazza Duomo in Milan on December 2, 2012. AFP PHOTO / GIUSEPPE CACACE

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People walk around a giant Christmas tree on November 24, 2012 in Strasbourg, eastern France on the opening day of the city's Christmas market, the largest and one of the eldest French Christmas markets. With over 300 market chalets, Strasbourg attracts over 1.6 million visitors during the Christmas season. AFP PHOTO / PATRICK HERTZOG

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People attend a Christmas tree lighting ceremony at the Cathedral hall in downtown Vilnius on December 1, 2012. AFP PHOTO / PETRAS MALUKAS

Holiday lights are seen in the Rotunda of Parliament Hill in Ottawa Dec 3, 2012. (ANDRE FORGET/QMI AGENCY)

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Fireworks light up the sky during the inauguration of a giant christmas tree at the Rodrigo de Freitas lagoon in Rio de Janeiro, Brazil on December 1, 2012. AFP PHOTO / ANTONIO SCORZA

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The Rockefeller Center Christmas Tree is lit November 28, 2012 in New York. AFP PHOTO/Stan HONDA

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Christmas decorations are seen at Lausanne Palace Hotel in Lausanne December 5, 2012. REUTERS/Denis Balibouse

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A 36-meter high Christmas tree is lighted up in central Stockholm, Sweden, on December 02, 2012. The tree is the worlds tallest Christmas tree made solely out of fir tree. AFP PHOTO /SCANPIX SWEDEN/Claudio Bresciani

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The U.S. Capitol Christmas Tree is pictured against a backdrop of the U.S. Capitol Building in Washington, December 4, 2012 during the official lighting ceremony for the tree. REUTERS/Jason Reed

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A general view of the Christmas fair held in front of the Palace of Culture in Warsaw December 5, 2012. REUTERS/Kacper Pempel

Young children light candles on the ice sculpture of a large Christmas tree and decorations in the garden of Tokyo's Takanawa Prince Hotel on November 30, 2012. Hotel guests and visitors enjoyed ice made Christmas illuminations. AFP PHOTO / Yoshikazu TSUNO

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A Christmas tree is illuminated at the Old Town Square on the eve of Saint Nicholas Day, a traditional festival celebrated in the name of the patron saint of children, sailors and merchants, in Prague December 5, 2012. REUTERS/David W Cerny